#include <stdio.h>
#include <stdlib.h>
#include <malloc.h>
#define QUEUE_MAX_SIZE 100
typedef struct Queue
{
    int elements [QUEUE_MAX_SIZE];
    int size;
}Queue;
int init_queue(Queue **q);
int enqueue(Queue *q,int value);
int dequeue(Queue *q,int *value);
int first(Queue *q,int *value);
int is_empty(Queue *q);
int size(Queue *q);